Answer:
Explanation:
From the question we are told that
Mass 
Velocity of mass 
Force of Tunnel 
Length of Tunnel 
Height of frictional incline 
Angle of inclination 
Acceleration due to gravity 
First Frictional surface has a coefficient 
Second Frictional surface has a coefficient 
Generally the initial Kinetic energy is mathematically given by
Generally the work done by the Tunnel is mathematically given as
Therefore
Generally the energy lost while climbing is mathematically given as
Generally the energy lost to friction is mathematically given as
Generally the energy left in the form of mass 
is mathematically given as
Since
Therefore
It slide along the second frictional region
Answer:
Option A.
Explanation:
The correct answer is Option A.
The car uses energy to move.
A car is a machine that converts energy locked in fuel like petrol or diesel and turn it into mechanical energy.
The energy produced from the combustion of gasoline is then used to move the shaft, which sends the power to the rear axle and the wheel starts to move.
Current is the amount of charged passed divided by elapsed time.
I = Q/Δt
I = current, Q = charge, Δt = elapsed time
We also know an electron has a charge of 1.6×10⁻¹⁹C, so let us find the total charge by multiplying this unit of charge by the total number of electrons:
Q = 1.6×10⁻¹⁹(3×10²⁰) = 48C
We also have Δt = 6s, so let's plug these values in to solve for I:
I = 48/6
I = 8A
Answer:
-13,594 J
Explanation:
First of all, we have to find the acceleration of the girl+sled system. This can be found by using Newton's second law of motion:
where:
F = -96 N is the net force (the force of friction) acting on the system
m = 28.4+15.3 = 43.7 kg is the total mass of the girl and the sled
a is their acceleration
Solving for a,
The negative sign means the sled is slowing down.
Now we can find the displacement of the sled during the deceleration phase, by using the suvat equation:
where
u = 41.8 m/s is the initial velocity
t = 3.76 s is the time
is the acceleration
So,
Now we can find the work done by friction on the sled, which is given by:
where
F = -96 N is the force of friction
s = 141.6 m is the displacement of the sled+girl system
Solving,
where the negative sign means the force is opposite to the displacement.
